Electric ignition device for internal-combustion engines.



. BATT. ELECTRIC IGNITION DEVICE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED MAR .25,1910.

Patented Sept. 6, 1910.

FIG. I.

IN VENTORL HBa/w w?$%/ WITNESSES I, flab/40% land,

' shaft of the .engine by hand. I attain this showing the position theparts take.

' denoted by like letters of reference and only backthrough its freeangle, and Figs. 4 and 'mature'comes to rest after the engine stops.

spindle a carrying the armature of the mag- 5.0-

'cupied by the 1 HENRY BATT, or nnmmnsi napa m, KELSO, soorLAnp.

ELECTRIC IGNITION.DEVICE FORIH'IERNAL COMBUSTION ENGINES.

Specification of Letters Patent.

Application filed March 25,1910. Serial No. 551,476.

Patented Sept. 6, '1910.

To loll whom it mayconcern:

-Be it known=that Llfimnr BA'I'I, a subject of'the King of Great Britainand Ire-"- *and resident of Hendersyde Park, Kelso, in 't-he county ofRoxburgh, Scotland, and resident of Hendersyde Park, in ElectricIgnition Devices for Internal- Oombustion Engines, of which the folloW-'ing is a specification.

This invention relates to electric ignition devices of the high-tensionmagneto type for internal-combustion engines, and consists of mechanismforapplication to a magneto whereby the armature can be rotatedindependent of its driving connection throughthe angle necessary for itto cut the lines of force-between the pole pieces, the object being toproduce a spark at the'terminals of the sparking plug-without crankingthe engine, i. 6. without rotating the crankend in the manner shown inthe accompanymgr-drawing, in which v igure 1 is a view in end elevationof a magneto-fitted'with this invention. Fig. 2 is a view in -endelevation-partly in section-with=part of the device removed so asto'show more clearly the details of'construction and the position theparts take up when the armature is pulled back through vice'removedshowing a modificatiomthe position of the parts shown being that whichthey :take up when the-armature is pulled 5 are/broken views in endeleva t ion'partly in section-with part of the device removed u(p, theformer when the armature is being riven by the :engine and the latterwhen the ar- Throughout the views similar parts are such parts of themagneto as are actually necessary to illustrate the invention are shown.

- Referring to Figs. 1, 2, 4 and 5, on the neto arem0un'tedin the placeusually ocart ofthe driving couple fixed on'thesai spindletwo disks 6'and c w-hiohform the driving couple, the former of which b-hereinaftercalled the driven disk-is fixed on the spindle'a by means of -Bctweenthe two disks is asprin riphery of the driven disk I).

the pawl h is drawn driven the pins (Z akey or other suitable device,and the latter of which c,hereafter called the driv-.

ing disk-is mounted loosely on the spindle a or on the boss of the disk6. The driving' disk 0 engages the driven disk Z) by means of a slottedconnection zZo-f which there are two shown in the drawingby means ofwhich there is a predetermined amount of free movement between the twoparts. In the construction shown the slots d are in the driven disk I)and the en aging pins (1 are carried by the driving disk 0.

e which operates to keep-the driven diskand with itthe armature) in asadvanced a position with respect to the driving disk as the slottedconnection will allow, a. e. the pins d carried by the disk 0 engage theends of the slots b to those they engage with in driving the armature ofthe magneto so that-the driving disk drives the driven disk against theaction of said spring. The driving disk 0 is coupled to the drivingmedium inany suitable manner. In the construction shown said disk isadapted to be driven by an axially arranged shaft and it is thereforeprovidedwith twolugs m as forming part of a dog clutch. In the peripheryof the driven disk I) is a channel 5 in which is loosely mounted a ringf on which is pivoted a pawl 71. which is adapted to engage with one oftwo ratchet teeth I) in-the pe- To the rin f 15 connected means forrotating it, such $01 instance as a Bowden wire o as shown, andconnected to the pawl /t is a sprin Z which is anchored to a bracketcarried by the frame m of the magneto in such a position that itoperates to normally keep said pawl out of contact with the teeth in theperiphery of the driven disk. When rotary motion is imparted to the ringf in the opposite direction to the normal direction of rotation of thearmature, which in the accompanying drawing is indicated by an arrow,into engagement with the adjacent tooth b in the disk I) and continuedmovement of said ring imparts rotary motion to the driven disk (andtherefore to the armature ofthe magneto) in the reverse direction to itsnormal direction of rotation.

The action of the device is as follows When the spindle of the armatureis being carried by the driving disk c'engage the forward ends-in thedirect-ion of'rotation of the slots at as shownopposite causes thedriven disk 3) to move forward,

'1'. e. in the-direction of its normal direction of driving so far asthe slotted connection will permit. This position is shown in Fig,

4. Owing to this advanced position of the part of the driving couplefixed to the arma-. ture spindle itallows of said part of the couple(and with it the armature) to be 'moved in the'reverse direction to itsnormal direction of rotation, which is edected'by pulling the wire 1;which first causes the pawl b, to engage one of the ratchet teeth in theperiphery of the driven disk I) and when said engagement is completed torotate said disk and with it the arrnaturel When the limit of movementis reachedowing to the slottedconnection-the wire is suddenly released,whereupon the driven disk-and with it the armatureis rapidly rotated inits normal direction of rotation by the action of the spring 6 throughthe necessary angle for itto cutthe lines of force between the polepieces and thus produce the current necessary to produce a spark at thetermimils of the sparking plug.

It will be understood that the relative positions of the variousoperative parts of the device are such that the angle through which thearmature can be rotated when the engine has come to a state of restafter running free is one which allows the armature to cut the lines offorce between the poles of the magnets. 1

In order to obtain a positive lock between the two disks forming" thedriving couple when the armature of the magneto is being driven, toavoid the noise andrchatter set up by the uneven torque common to allmagnetos and intensified in this construction by reason of the free playbetween the two parts of the driving connection, I empl'oy a positivelocking connection'between the two disks. A convenient one is thatillustrated in Fig. 3 of the accompanying drawing which consists of apawl n mounted on the driven disk I) and'adapt'ed to engage with a notch0- inthe periphery of the driving disk 0 when the two disks are in theirproper relative positions for driving. In this construction the drivingdisk 0 drives the driven disk Z) through the pawl '11, and the notch 0and not through the slotted connection (Z (Z which. in this constructionserves only to limit the free movement between the two parts of thedriving couple. The spring 6 may conveniently be connected to the drivendisk through the pawl n so that it operates also to keep said pawl inits operative position. To bring the pawl it out of action a slidingratchet r is employed which is shaped to adapt it to slide within thedriven disk and engage said pawl. The

cases? ends of the ratchet r project through slots 6 1n the periphery ofthe fixed disk forming extensions of the ratchet teeth 5 with which theoperating pawl it engages, so that when said pawl (carried by the ringis operated to cause it to engage one or other of said ratchet teeth itfirst engages one or other end of the sliding-ratchet r and by pressingon same causes it to move to operate to withdraw the pawl it out ofengagement with the driving disk 0 and thus releases the driven diskandpermits it (and with it the armature) to be moved backward, z'. e. inthe reverse direction to its normal direction of rotation, for producingthe spark as before, described.

What I claim as my invention and desire to secure by Letters Eatentis 1. In an igniter, the combination, with an armature spindle, and adriven disk secured thereon; of a driving disk operatively connectedwith the driven-disk, a spring connection interposed between the saiddisks and permitting them to move independently to a limited-extent,aring journaled concentrio with the said spindle and provided with a pawlfor engaging with the said driveir disk, means for revolving the saidring at will backward of the motion of the armature, and a spring whichholds the pawl out ofcngagement with the driven disk until the said ringis revolved backward and which subsequently restores the ring and pawlto their original positions.

2. In an igniter, the combination, with an armature spindle, and atoothed driven disk secured thereon; of a driving disk operativelyconnected with the driven disk, a spring connection interposed betweenthe said disks and permitting them to move in- -de endently to a limitedextent, a ring journa ed on the driven disk, a pawl pivoted to the saidring, means for revolving the ring at will backward of the motion of thearmature, and aspring which holds thepawl out of engagement with thetoothed driven disk until the said ring is revolved backward and whichsubsequently restores the ring and pawLto their original positions.

3. A driving couple for high-tension magnetos comprising two disks.mounted on the spindle of the armature the one fixed and the other loosethereon, a slotted connection between the two disks whereby a limitedamount of relatively free movement between said disks isprovided, "aspring operating circumferentially between the two disks, a ring looselymounted on the disk fixed on the armature spindle, a pawl pivoted onsaid ring, two ratchet teeth in said fixed disk with which said pawl canengage, means for operating said pawl to bring it into oper-I iietoscomprising two disks mounted on the spindle of the armature the onefixed and the other loose thereon, a spring operating eireumferentiallybetween the two disks, a pawl pivoted on the disk fixed on the armatorespindle, a notch or tooth in the loose disk with which said pawl canengage, a Siding ratchet adapted to lift the said pawl ontof engagementwith said notch ortooth, ring loosely mounted on the disk fixed on thearmature spindle, a pawl pivoted on said ring, two ratchet teeth in saidfixed disk with which said pawl can engage, means for operating saidpawl to bring it into operative engagement with said. ratchet teeth,means for rotating said ring. 7

5. A driving couple for high-tension magnetos comprising two disksmounted on the spindle of the armature the one fixed and the other loosethereon, a slotted connection between the two disks whereby a limitedamount of relatively free movement between said disks is rovided, a sring operating circumferentia ly between t e two disks, a pawl pivotedon the disk fixed on the armature spindle, a notch or tooth 'in theloose diskwith which said pawl can en age, a slidin ratchet adapted tolift the said pawl out of enga ement with said notch or tooth, a ringloose y mounted on the disk fixed on the armature s indie, a pawlpivoted on said ring, two rats et t eth in said fixed disk with whichsaid pawl can engage, means for operating said pawl to bring it intooperative engagement with said ratchet teeth, means for rotating saidring.

' In testimony whereof I have'hereunto aflixed my name in the presenceof two subscribing witnesses.

HENRY BATT.

I Witnesses: Rosana Fisn, MARK Swan.

